Can I over-ride the getProperty function?

Hi folks,

Is it possible to over-ride a property “getter” for a class? 

Or should I use a constructor or something to fill up a particular property, if it doesn’t come directly from the database?

Also, I noticed I have one function that starts with get, even though I don’t have a corresponding property, and it still gets created/shown as a property in the view.  Interesting – is there a reason for that?

Thanks,

Pam

Hi Pam,

Yes you can override any property getter for a class in the usual groovy/java way.

There are several ways you can create a default value for a property directly in the grails GORM class:

/** implicit virtual initializer */

class MyDomainObj {

  String myProp = “aDefault”
}

/** explicit virtual initializer */

class MyDomainObj {

  String myProp

  {

    myProp  = “aDefault”
  }

}

For your function that starts with ‘get’, there is no requirement that you have a corresponding property.  The JavaBean conventions are that if you have a method that follows the pattern:

public <return value> getXXX()

then it will be considered to be the readable property XXX of type <return value>.

Jay Guidos

Hi folks,

Is it possible to over-ride a property “getter” for a class? 

Or should I use a constructor or something to fill up a particular property, if it doesn’t come directly from the database?

Also, I noticed I have one function that starts with get, even though I don’t have a corresponding property, and it still gets created/shown as a property in the view.  Interesting – is there a reason for that?

Thanks,

Pam

Thank you.  I was getting errors when I tried to do that, but it turns out it had something to do with the way I was collecting the objects, it’s just that the error didn’t make any sense, so I didn’t know if I could do that.

Thanks!

Hi Pam,

Yes you can override any property getter for a class in the usual groovy/java way.

There are several ways you can create a default value for a property directly in the grails GORM class:

/** implicit virtual initializer */

class MyDomainObj {

  String myProp = “aDefault”
}

/** explicit virtual initializer */

class MyDomainObj {

  String myProp

  {

    myProp  = “aDefault”
  }

}

For your function that starts with ‘get’, there is no requirement that you have a corresponding property.  The JavaBean conventions are that if you have a method that follows the pattern:

public <return value> getXXX()

then it will be considered to be the readable property XXX of type <return value>.

Jay Guidos

Hi folks,

Is it possible to over-ride a property “getter” for a class? 

Or should I use a constructor or something to fill up a particular property, if it doesn’t come directly from the database?

Also, I noticed I have one function that starts with get, even though I don’t have a corresponding property, and it still gets created/shown as a property in the view.  Interesting – is there a reason for that?

Thanks,

Pam